2933.99.90.00/Methimazole Tablets API/Japan

Methimazole Tablets API from Japan

Methimazole is an imidazole derivative antithyroid drug, a nitrogen heterocyclic compound specifically under HTS 2933.99.90.00 as a drug. It inhibits thyroid hormone synthesis and is imported as active pharmaceutical ingredient.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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Import Tips

• Submit FDA IND or ANDA documentation for API import

• Ensure stability data for imidazole degradation during shipping

• Check for tapazole trademark issues affecting generic labeling